60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
|
#include <assert.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include "dims.h"
|
||
|
|
|
||
|
|
struct ct_dims *new_dims(int x, int y, int width, int height) {
|
||
|
|
struct ct_dims *dims;
|
||
|
|
|
||
|
|
dims = (struct ct_dims *)malloc(sizeof(struct ct_dims));
|
||
|
|
*dims = (struct ct_dims){
|
||
|
|
.x = x,
|
||
|
|
.y = y,
|
||
|
|
.width = width,
|
||
|
|
.height = height,
|
||
|
|
};
|
||
|
|
return dims;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct ct_dims *dup_dims(const struct ct_dims *const dims) {
|
||
|
|
struct ct_dims *dup;
|
||
|
|
dup = (struct ct_dims *)malloc(sizeof(struct ct_dims));
|
||
|
|
memcpy(dup, dims, sizeof(struct ct_dims));
|
||
|
|
|
||
|
|
return dup;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Calculate the dimensions for nodes resulting from a bifurcation.
|
||
|
|
* Returns 0 on success, and 1 on failure if any width/height are 0 characters.
|
||
|
|
* WARNING: This function does not guarantee the x,y positions returned
|
||
|
|
* WARNING: are valid screen coordinates.
|
||
|
|
*/
|
||
|
|
int bifurcate_dims(const struct ct_dims *const parent_dims,
|
||
|
|
const enum ct_axis axis, const float ratio,
|
||
|
|
struct ct_dims **const dims0, struct ct_dims **const dims1) {
|
||
|
|
assert(0 < ratio && ratio < 1);
|
||
|
|
struct ct_dims *_dims0, *_dims1;
|
||
|
|
|
||
|
|
_dims0 = dup_dims(parent_dims);
|
||
|
|
_dims1 = dup_dims(parent_dims);
|
||
|
|
|
||
|
|
if (axis == AXIS_X) {
|
||
|
|
_dims0->width *= ratio;
|
||
|
|
_dims1->width -= _dims0->width;
|
||
|
|
_dims1->x += _dims0->width;
|
||
|
|
} else {
|
||
|
|
_dims0->height *= ratio;
|
||
|
|
_dims1->height -= _dims0->height;
|
||
|
|
_dims1->y += _dims0->height;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!_dims0->width || !_dims0->height || !_dims1->width || !_dims1->height)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
// propagate bifurcated dimensions
|
||
|
|
*dims0 = _dims0;
|
||
|
|
*dims1 = _dims1;
|
||
|
|
return 0;
|
||
|
|
}
|